The sand (gravel ) pumps of the ES series are horizontal, single-casing centrifugal pumps with high head, that represent a cost-effective solution for the highly efficient and reliable non-stop pumping of extremely aggressive slurries, with a wide particle size distribution. These units feature a casing with large volume internal profile, that reduces associated velocities for much lower component wear. These pumps use a single-casing design with clamp band connections and offer a wide wet-passage, with all wet-components made out of Ni–hard and high-chrome wear–resistant alloys. Additionally, these models feature easy installation, excellent performance of NPSH and a 360° discharge orientation.